<template>
  <view>
    <view class="goods-list">
      <view v-for="(goods,i) in goodsList" :key="i" @click="gotoDetail(goods)">
        <my-goods :goods="goods"></my-goods>
      </view>
    </view>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        // 请求参数对象
        queryObj: {
          // 查询关键词
          query: '',
          // 商品分类Id
          cid: '',
          // 页码值
          pagenum: 1,
          // 每页显示多少条数据
          pagesize: 12,
        },
        // 商品列表的数据
        goodsList: [],
        // 总数量，用来实现分页
        total: 0,
        // 是否正在请求数据
        isloading: false
      };
    },
    onLoad(objects) {
      // 将页面参数转存到 this.queryObj 对象中
      this.queryObj.query = objects.query || ''
      this.queryObj.cid = objects.cid || ''
      // 调用获取商品列表数据的方法
      this.getGoodsList()
    },
    methods: {
      // 获取商品列表数据的方法
      async getGoodsList(cb) {
        // ** 打开节流阀
        this.isloading = true
        // 发起请求
        const {
          data: res
        } = await uni.$http.get('/api/public/v1/goods/search', this.queryObj)
        // ** 关闭节流阀
        this.isloading = false
        // 只要数据请求完毕，就立即按需调用 cb 回调函数
        cb&&cb()
        if (res.meta.status !== 200) return uni.$showMag()
        // 为数据赋值：通过展开运算符的形式，进行新旧数据的拼接
        this.goodsList = [...this.goodsList, ...res.message.goods]
        this.total = res.message.total
      },
      // 点击跳转到商品详情页面
      gotoDetail(item){
        uni.navigateTo({
          url:'/subpkg/goods_detail/goods_detail?goods_id=' + item.goods_id
        })
      }
    },
    // 触底的事件
    onReachBottom() {
      // 判断是否还有下一页数据
      if (this.queryObj.pagenum * this.queryObj.pagesize >= this.total) return uni.$showMsg("文件加载完成！")
      // uni.showToast({
      //   title:"文件加载完成！",
      //   duration:1500,
      //   icon:'none'
      // })
      // 判断是否正在请求其它数据，如果是，则不发起额外的请求
      if (this.isloading) return
      // 让页码值自增 +1
      this.queryObj.pagenum++
      // 重新获取列表数据
      this.getGoodsList()

    },
    // 下拉刷新的事件
    onPullDownRefresh(){
      // 1. 重置关键数据
      this.queryObj.pagenum = 2
      this.total = 0
      this.isloading = false
      this.goodsList = []
      
       // 2. 重新发起请求
       this.getGoodsList(()=>{
         uni.stopPullDownRefresh()
       })
    }
  }
</script>



<style scoped lang="scss">

</style>



<!-- <template>
  <view>
    Goods-list
    <view v-for="(shop, index) in shopList" :key="index">
      {{ shop.name }}
    </view>
  </view>
</template>

<script>
export default {
  data() {
    return {
      params: {},
      shopList: [],
      page: 1,
      pageSize: 10,
      total: 0,
      isLoading: false
    };
  },
  onLoad(options) {
    this.params = options;
    this.getShopList();
  },
  methods: {
    async getShopList(cb) {
      this.isLoading = true;
      try {
        const { data: res } = await uni.$http.get(`https://applet-base-api-t.itheima.net/categories/${this.params.id}/shops`,{_page:this.page,_limit:this.page});
        if (res.status !== 200) {
          uni.hideLoading();
          this.isLoading = false;
          cb && cb();
          return uni.$showMsg('数据获取失败');
        }
        this.shopList = [...this.shopList, ...res.data];
        this.total = parseInt(res.header['X-Total-Count'], 10);
      } catch (error) {
        console.error(error);
        uni.$showMsg('请求出错');
      } finally {
        this.isLoading = false;
        cb && cb();
      }
    }
  },
  onPullDownRefresh() {
    this.page = 1;
    this.shopList = [];
    this.total = 0;
    this.getShopList(() => {
      uni.stopPullDownRefresh();
    });
  },
  onReachBottom() {
    if (this.page * this.pageSize >= this.total) {
      return uni.$showMsg("数据加载完毕！");
    }
    if (this.isLoading) return;

    this.page += 1;
    this.getShopList();
  }
}
</script>

<style lang="scss">
/* Add your styles here */
</style -->>